JPH08254657A - Photographic device for microscope - Google Patents

Abstract

PURPOSE: To obtain a photographic device in which consecutive correction is realized, in which correction accuracy is improved, whose cost is low, and which has color temperature correcting function by outputting a result corrected by a color temperature correcting means as the color temperature of light transmitted through an optical path on an image-pickup means side from a color temperature meter. CONSTITUTION: The color temperature difference of light beams respectively passing through an optical path A to a camera 22 and an optical path B to the color temperature meter 23 through a prism 24 inside a photographic device main body 21 is stored in a storing device 25 as a correction value, and the color temperature measured from the light beam guided to the optical path B to the color temperature meter 23 is corrected based on the correction value stored in the storing device 25. Thus, the correction value stored in the device 25 can be a consecutive state not a step state in comparison with a conventional photographic device in which various kinds of tone correction filters are previously prepared to be selectively used, so that highly accurate correction can be performed, and also the various kinds of tone correction filters need not be prepared, so that the cost can below.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a photographing apparatus for a microscope provided with a color thermometer having a color temperature correcting function.

[0002]

2. Description of the Related Art Generally, a photographing apparatus of a microscope attaches a camera to an upper end portion of a lens barrel of the microscope, and photographs the light guided from an observation optical path on a film surface in the camera with an appropriate exposure time for photographing. I am trying to do it.

In this case, if the color temperature of the light incident on the camera changes due to the brightness of the illumination device in the microscope or the coloring of the optical elements arranged in the optical path, the color reproducibility of the photograph may deteriorate. is there.

Therefore, conventionally, in order to prevent such deterioration of color reproducibility of photographs, a color thermometer is used to manage the color temperature of light incident on the camera to a constant value. However, in the case of monochrome photography or fluorescence photography, management of the color temperature is not required, and the color thermometer may be omitted because it can be managed to some extent by setting the lamp voltage for illumination of the microscope. Therefore, in general, the color thermometer is often attached separately from the photographic device.

Generally, in a photographing device, an optical path for guiding light to the color thermometer side is provided separately from the optical path for guiding light to the camera side, and the optical path on the camera side is always secured. Thus, only when measuring the color temperature, the optical path is switched to the color temperature measuring side.

In this case, since the optical system that passes through differs between the light incident on the camera side and the light incident on the color thermometer side, if there are variations in optical components, a difference in color temperature will occur. Will end up. Moreover, since this color temperature difference varies depending on the photographing device, an error occurs in the value of the color temperature obtained by combination with another color thermometer, and compatibility is lost.

In order to solve this, conventionally, a color tone correction filter is inserted in the optical path to the color thermometer of the photographic device, and by this filter, the color temperature difference between the optical path on the camera side and the optical path on the color thermometer side is zero. Or, it is adjusted to a constant value. In this way, the color temperature is adjusted in the color thermometer by including the constant temperature difference by the color tone correction filter, so that the color temperature displayed on the color thermometer is always close to the color temperature of the optical path on the camera side. .

[0008]

However, in order to set the color temperature difference between the optical path on the camera side and the optical path on the color thermometer side to zero or a constant value in this way, in the case where the color tone correction filter is used, the number of types is previously set. Since color tone correction filters are prepared and these filters are used selectively, the adjustment values for correction are not stepwise and continuous,
The correction accuracy will decrease. Therefore, it is conceivable to prepare various kinds of color tone correction filters in order to improve the correction accuracy, but this is disadvantageous in terms of cost.

The present invention has been made in view of the above circumstances, and provides a microscope having a color temperature correction function that can realize continuous correction to improve the correction accuracy and is inexpensive. An object is to provide a photographic device.

[0010]

According to the first aspect of the present invention,
In a photographic device provided with a color thermometer for taking a photograph of a microscope and measuring the color temperature of light guided to an image pickup means, an optical path for guiding incident light from the microscope to the image pickup means side and the color thermometer. And a difference between the color temperature of light passing through the optical path on the side of the image pickup unit and the color temperature of light passing through the optical path on the side of the color thermometer is stored as a correction value. The correction value storage means and the color temperature correction means for correcting the color temperature of the light passing through the optical path on the color thermometer side by the correction value of the correction value storage means are provided and corrected by the color temperature correction means. The result is output from the color thermometer as the color temperature of the light passing through the optical path on the imaging means side.

According to a second aspect of the present invention, the color thermometer is attachable to and detachable from the main body of the photographic device.
The color temperature correction means is provided inside the color thermometer, and the correction value storage means is provided inside the main body of the photographic device. In the invention according to claim 3, the correction value storage means is composed of a volume or solid-state memory capable of voltage adjustment.

[0012]

As a result, according to the invention described in claim 1 or 3, the photo-taking device main body has an optical path for guiding the incident light from the microscope to the imaging means side and an optical path for guiding the incident light to the color thermometer side.
The difference between the color temperature of the light passing through the optical path of the image pickup means and the color temperature of the light passing through the optical path of the color thermometer side is stored as a correction value in the correction value storage means, and the correction value storage means is corrected. The color temperature of the light passing through the optical path on the color thermometer side is corrected by the value by the color temperature correcting means, and the result is output from the color thermometer as the color temperature of the light passing through the optical path on the imaging means side. Therefore, as compared with the conventional method in which several kinds of color tone correction filters are prepared in advance and these filters are selectively used, the correction value in the correction value storage means can be continuous rather than stepwise, and Since it is not necessary to prepare various kinds of color tone correction filters, the price can be reduced.

According to the second aspect of the invention, the color thermometer can be attached to and detached from the main body of the photographic device, the color temperature correction means is inside the color thermometer, and the correction value storage means is Since the correction value storage means can store the correction value for each photography device because it is provided inside the photography device main body, an arbitrary color thermometer can be provided for the photography device main body having such correction value storage means. Even if the color thermometer is attached, the color thermometer can correctly output the color temperature of the light passing through the optical path on the image pickup means side, and the compatibility of the color thermometer with the main body of the photographic device can be maintained.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. (First Embodiment) FIG. 1 shows a schematic structure of a transmission microscope having a photographing device. In this case, 1 is a microscope main body, and a base 2 is provided under the microscope main body 1,
A light source 3 for transmitted illumination is provided on the base 2.

Then, the luminous flux from the transillumination light source 3 is taken into the base 2 and is incident on the observation optical axis in the vertical direction via the mirror 4. Further, a condenser lens 5 and a stage 6 are arranged in an intermediate portion of the microscope body 1, and a light beam from the light source 3 which is incident on the observation optical axis through the mirror 4 is passed through the condenser lens 5 and a sample on the stage 6 is provided. 7 through which the observation light is made incident on the lens barrel 10 through the objective lens 9 supported by the revolver 8 to enable magnified observation by the eyepiece lens 11, and by the photographic device 12 attached to the tip of the lens barrel 10. I am able to take images.

FIG. 2 shows a schematic structure of a photographing device 12 attached to such a microscope. in this case,
Reference numeral 21 is a main body of the photographic device, to which a camera 22 is attached and a color thermometer 23 is detachably provided.

Inside the apparatus main body 21, the lens barrel 1 described above is provided.
A prism 24 to which incident light from 0 is given is provided. The prism 24 switches the optical path of the incident light from the lens barrel 10 to either the optical path A that guides the camera 22 or the optical path B that guides the color thermometer 23.

A storage device 25 is provided inside the apparatus main body 21. The storage device 25 measures in advance the color temperature difference between the light passing through the optical path A to the camera 22 via the prism 24 and the optical path B to the color thermometer 23, and the color temperature difference is used as correction value information. It was memorized as.

Now, when the color thermometer 23 is attached to the main body 21 of the photographing apparatus, the color temperature difference information stored in the storage device 25 inside the main body 21 of the apparatus is read and given to the color thermometer 23. Then, in the color thermometer 23, the color temperature measured from the light guided to the optical path B to the color thermometer 23 is corrected value information read from the storage device 25, that is, the camera 22 via the prism 24. Is corrected by the difference in color temperature between the optical path A to the color thermometer 23 and the optical path B to the color thermometer 23, and the correction result is output as a measurement value of the color temperature of the light guided to the optical path A to the camera 22.

Therefore, according to such a first embodiment,
The color temperature difference between the light passing through the optical path A to the camera 22 and the color temperature passing through the optical path B to the color thermometer 23 via the prism 24 inside the photographic device main body 21 is stored in the storage device 25 as a correction value. In the color thermometer 23, the color thermometer 23
Since the color temperature measured from the light guided to the optical path B to the optical path is corrected by the correction value stored in the storage device 25, various kinds of conventional color tone correction filters are prepared in advance, and these filters are used. Compared to those used selectively,
Since the value for correction stored in the storage device 25 can be continuous instead of stepwise, highly accurate correction can be realized, and moreover, various kinds of color tone correction filters are not prepared, so that the price is low. Is also cheaper.

Further, since the color temperature difference between the optical path A to the camera 22 and the optical path B to the color thermometer 23 can be stored in the storage device 25 for each photography device, the photography device having such a storage device 25 can be stored. When the optional color thermometer 23 having the above-mentioned function is attached to the main body 21, the color thermometer 2
3 can correctly display the color temperature value of the light passing through the optical path A to the camera 22, and since the compatibility of the color thermometer 23 with the photographic device main body 21 is maintained, it can be economically advantageous. (Second Embodiment) FIG. 3 shows a schematic configuration of the second embodiment, and the same parts as those in FIG. 2 are designated by the same reference numerals. In this case, the lens barrel 10 is provided inside the apparatus main body 21 and described above.
The prism 24 to which the incident light from is given is switched between the optical path A of the incident light from the lens barrel 10 to the camera 22 and the optical path B to the color thermometer 23 by its movement. In addition, inside the device main body 21,
A volume 26 connected in series with a DC power source 261 is provided. The volume 26 allows voltage adjustment arbitrarily, and here, the camera 2 via the prism 24 is used.
From the color temperature difference between the color temperature of the light passing through the optical path A to 2 and the color temperature of the light passing through the optical path B to the color thermometer 23, a voltage value corresponding to this color temperature difference is set as the correction value M. I am trying to do it. The correction value M is given to the color temperature correction circuit 231 described later when the color thermometer 23 is attached to the main body 21 of the photographing device.

On the other hand, inside the color thermometer 23, a color temperature correction circuit 231, a light receiving circuit 232 and a display circuit 233 are provided. The light receiving circuit 232 outputs the color temperature signal V corresponding to the color temperature of the light by the light on the optical path B to the color thermometer 23 via the prism 24. The signal V is sent to the color temperature correction circuit 231. I am trying to give. The color temperature correction circuit 231 uses the color temperature signal V from the light receiving circuit 232.
And the correction function f by the correction value M from the volume 26
The color temperature is corrected based on (M, V), and the output V'is displayed on the display device 233.

First, with respect to the volume 26 in the main body 21 of the photographic device, the color temperature of the optical path A to the camera 22 and the optical path B to the color thermometer 23 through the prism 24.
From the color temperature difference with the color temperature of, the voltage value corresponding to this color temperature difference is set as the correction value M. That is, the correction value M of the volume 26 at this time is the correction amount necessary for the color temperature correction circuit 231 to match the color temperature of the optical path B to the color thermometer 23 with the color temperature of the optical path A to the camera 22. Is what you get.

From this state, in the color thermometer 23 attached to the main body 21 of the photographic device, the lens barrel 1
When the incident light from 0 is given to the optical path B to the color thermometer 23 via the prism 24, the difference between the color temperature of the optical path A to the camera 22 and the color temperature is adjusted by the color temperature correction circuit 232.
The correction result M is corrected based on the correction value M, and the corrected result is displayed on the display device 233. The color temperature displayed on the display device 233 matches the color temperature of the light incident on the optical path A to the camera 22.

Therefore, according to the second embodiment as well, the color of the light passing through the optical path A to the camera 22 and the optical path B to the color thermometer 23 through the prism 24 inside the main body 21 of the photographic device, respectively. The temperature difference is set in the volume 26 as the correction value M, and the color temperature measured by the color thermometer 23 from the light guided to the optical path B to the color thermometer 23 is set in the volume 26. Since the correction is made by the value M, the value for correction set in the volume 26 can be made continuous rather than stepwise as in the first embodiment, and highly accurate correction can be realized. Moreover, it becomes cheaper in price.

Further, since the color temperature difference between the optical path A to the camera 22 and the optical path B to the color thermometer 23 can be set in the volume 26 for each photographing device, such a volume 26
Even when the optional color thermometer 23 having the above-mentioned function is attached to the main body 21 of the photographic device, the color thermometer 23 can correctly display the color temperature value of the light passing through the optical path A to the camera 22. The compatibility of the color thermometer 23 with the main body 21 of the photographing device can be maintained, which is economically advantageous.

Although the volume is used as the color temperature difference setting means in the second embodiment, a dip switch or a rotary switch may be used as long as the output voltage can be changed. (Third Embodiment) FIG. 4 shows a schematic configuration of the third embodiment. The same parts as those in FIG. 3 are designated by the same reference numerals. In this case as well, the lens barrel 10 is provided inside the apparatus main body 21 and described above.
The prism 24 to which the incident light from is given is switched between the optical path A of the incident light from the lens barrel 10 to the camera 22 and the optical path B to the color thermometer 23 by its movement. In addition, inside the device main body 21,
A solid-state memory 27 and a D / A converter 28 are provided. Here, the memory 27 stores the color temperature difference between the color temperature of the light passing through the optical path A to the camera 22 via the prism 24 and the color temperature of the light passing through the optical path B to the color thermometer 23 as digital data. Is stored as a correction value M ′ according to
When the color thermometer 23 is attached to the main body 21 of the photographic device, ′ is converted into an analog signal through the D / A converter 28,
It is applied to the color temperature correction circuit 231.

On the other hand, in the color temperature correction circuit 231 inside the color thermometer 23, the correction function f (M ', V) based on the color temperature signal V from the light receiving circuit 232 and the correction value M'from the memory 27.
The color temperature is corrected based on the
33 is displayed.

In this case, however, the color temperature of the optical path A to the camera 22 via the prism 24 and the color temperature of the optical path B to the color thermometer 23 are first stored in the memory 27 inside the photographic apparatus main body 21. The color temperature difference is stored as a correction value M ′ by digital data. That is, the correction value M ′ of the memory 27 at this time is determined by the color temperature correction circuit 231 in which the color temperature of the optical path B to the color thermometer 23 is the optical path A to the camera 22.
It is possible to obtain the correction amount necessary to match the color temperature of.

From this state, the color thermometer 23 attached to the main body 21 of the photographic device is used to adjust the lens barrel 10 described above.
When the incident light from is given to the optical path B to the color thermometer 23 via the prism 24, the correction value M ′ of the memory 27 becomes D /
The signal is converted into an analog signal by the A converter 28 and given to the color temperature correction circuit 231. As a result, the color temperature correction circuit 2
In 32, the difference from the color temperature of the optical path A to the camera 22 is corrected based on the correction value M ′, and the corrected result is displayed on the display device 233. This display device 23
The color temperature displayed in 3 corresponds to the color temperature of the light incident on the optical path A to the camera 22.

Therefore, according to the third embodiment as well, the color of light passing through the optical path A to the camera 22 and the optical path B to the color thermometer 23 through the prism 24 in the main body 21 of the photographic device, respectively. The temperature difference is stored in the memory 27 as a correction value M ′, and the color temperature measured by the color thermometer 23 from the light guided to the optical path B to the color thermometer 23 is stored in the memory 27. Since the correction is made by the correction value M ′, the memory 27 is processed in the same manner as in the first embodiment.
The value for correction stored in the memory can be continuous instead of stepwise, highly accurate correction can be realized, and the price is low.

Further, since the color temperature difference between the optical path A to the camera 22 and the optical path B to the color thermometer 23 can be stored in the memory 27 for each photographic device, the photographic device main body 21 having such a memory 27. However, even when the optional color thermometer 23 having the above-described function is mounted, the color thermometer 23 can correctly display the color temperature value of the light passing through the optical path A to the camera 22, and the color temperature of the color of the main body 21 of the photographic device 21 can be increased. The compatibility of the thermometer 23 can be maintained, which is economically advantageous.

In the third embodiment, the D / A converter 28 is provided inside the main body 21 of the photographing device.
The A converter 28 may be provided inside the color thermometer 23. Further, although the D / A converter 28 is used as a means for converting the digital data of the memory 27 into an analog signal, if the color temperature correction circuit 231 is processed by a CPU or the like, the digital data is directly received from the memory 27. It is also possible to pass it.

The above description is based on the embodiments, but the present invention includes the following inventions. (1) In a photographic device provided with a color thermometer for taking a photograph of a microscope and measuring a color temperature of light guided to an image pickup means, an optical path for guiding incident light from the microscope to the image pickup means side, and A main body of the photographing device having an optical path leading to the color thermometer side, and a correction value for the difference between the color temperature of the light passing through the optical path of the image pickup means and the color temperature of the light passing through the optical path of the color thermometer side. And a color temperature correction means for correcting the color temperature of the light passing through the optical path on the color thermometer side with the correction value of the correction value storage means. A photograph taking apparatus for a microscope, wherein the corrected result is output from the color thermometer as a color temperature of light passing through an optical path on the side of the image pickup means.

In this way, compared with the conventional method in which many kinds of color tone correction filters are prepared in advance and these filters are selectively used, the correction values in the correction value storage means are not stepwise but continuous. Since it is possible to realize a precise correction, it is possible to realize highly accurate correction, and since it is not necessary to prepare various kinds of color tone correction filters, the cost can be reduced.

(2) In the microscope photographic device according to (1), the color thermometer is detachable from the main body of the photographic device, and the color temperature correction means is provided inside the color thermometer. The correction value storage means is provided inside the main body of the photographing apparatus.

By doing so, even when an arbitrary color thermometer is attached to the main body of the photographic apparatus having the correction value storage means, the color thermometer can correctly measure the color of the light passing through the optical path on the imaging means side. Since the temperature can be output, the compatibility of the color thermometer with the main body of the photographic device can be maintained, which is economically advantageous.

(3) In the photographing apparatus for a microscope according to (1) or (2), the correction value storage means is a volume or solid-state memory capable of voltage adjustment. In this way, the same effect as (1) can be expected.

[0039]

As described above, according to the present invention, the correction in the correction value storage means is different from the conventional one in which several kinds of color tone correction filters are prepared in advance and these filters are selectively used. Since the values can be continuous rather than stepwise, highly accurate correction can be realized, and moreover, various types of color tone correction filters are not prepared, so the cost can be reduced.

Also, when an arbitrary color thermometer is attached to the main body of the photographic apparatus having the correction value storage means, the color thermometer can correctly output the color temperature of the light passing through the optical path on the image pickup means side. As a result, the compatibility of the color thermometer with the main body of the photographic device can be maintained, which is economically advantageous.

[Brief description of drawings]

FIG. 1 is a side view of a microscope to which a photography device of the present invention is attached.

FIG. 2 is a diagram showing a schematic configuration of a first embodiment of the present invention.

FIG. 3 is a diagram showing a schematic configuration of a second embodiment of the present invention.

FIG. 4 is a diagram showing a schematic configuration of a third embodiment of the present invention.

[Explanation of symbols]

 1 ... Microscope main body, 2 ... Base, 3 ... Transmitted illumination light source, 4 ... Mirror, 5 ... Condenser lens, 6 ... Stage, 7 ... Specimen, 8 ... Revolver, 9 ... Objective lens, 10 ... Lens barrel, 11 ... Eyepiece Lens, 12 ... Photographing device, 21 ... Photographing device main body, 22 ... Camera, 23 ... Color thermometer, 231 ... Color temperature correction circuit, 232 ... Light receiving circuit, 233 ... Display device, 24 ... Prism, 25 ... Storage device , 26 ... Volume, 27 ... Memory, 28 ... D / A converter.

Claims (3)

[Claims] 1. A photography apparatus provided with a color thermometer for taking a photograph of a microscope and measuring a color temperature of light guided to an imaging means, wherein an optical path for guiding incident light from the microscope to the imaging means side. And a photo-taking device main body each having an optical path leading to the color thermometer side, and a difference between the color temperature of light passing through the optical path on the side of the image pickup means and the color temperature of light passing through the optical path on the side of the color thermometer. A color temperature correction unit for storing the correction value as a correction value; and a color temperature correction unit for correcting the color temperature of the light passing through the optical path on the color thermometer side with the correction value of the correction value storage unit. A photo taking device of a microscope, wherein the result corrected by the means is output from the color thermometer as the color temperature of the light passing through the optical path on the side of the imaging means. 2. The color thermometer is attachable to and detachable from the main body of the photographing apparatus, the color temperature correcting means is inside the color thermometer, and the correction value storing means is inside the main body of the photographing apparatus. The photo-taking device for a microscope according to claim 1, wherein the photo-taking device is provided for each of the above. 3. The apparatus for photographing with a microscope according to claim 1, wherein the correction value storage means is a volume or solid-state memory capable of voltage adjustment.